The r-process in black hole-neutron star mergers based on a fully general-relativistic simulation

6th Nuclear Physics in Astrophysics

物理学;天文学

Nishimura, N.^1 ; Wanajo, S.^2 ; Sekiguchi, Y.^3 ; Kiuchi, K.^4 ; Kyutoku, K.^2 ; Shibata, M.^4

Astrophysics Group, Keele University, Keele

ST5 1BH, United Kingdom^1

ITHES Research Group, RIKEN, Wako

351-0198, Japan^2

Department of Physics, Toho University, Chiba

274-8510, Japan^3

YITP, Kyoto University, Kyoto

606-8502, Japan^4

关键词: Black holes;    Electro-magnetic transient;    General Relativity;    Hydrodynamical model;    Neutron number;    Neutron stars;    R-process nucleosynthesis;    Reaction network;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012059/pdf
DOI  :  10.1088/1742-6596/665/1/012059

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We investigate the black hole-neutron star binary merger in the contest of the r-process nucleosynthesis. Employing a hydrodynamical model simulated in the framework of full general relativity, we perform nuclear reaction network calculations. The extremely neutron-rich matter with the total mass 0.01 Mois ejected, in which a strong r-process with fission cycling proceeds due to the high neutron number density. We discuss relevant astrophysical issues such as the origin of r-process elements as well as the r-process powered electromagnetic transients.